Yep. The head armour was fixed, with two angled, steel brackets near the top, and two joining the bottom to the bottom sill of the canopy, and weighed quite a bit, over 18lb IIRC. The hatch in the rear bulkhead was nominally a 'luggage locker', and is where the engine starter crank handle was normally stored, held in 'Jubilee' clips, and also had access to the fuel tank pressure vent. It was, of course, also used for such things as the pilot's service cap, with other luggage, such as a small bag for personal kit on a transit flight, being wedged into the radio compartment hatch. (the first aid kit was also stored here, on the inner face of the hatch cover, and, in the tropical version, a Kar98K rifle and ammo, and water and emergency rations, were also stored here.)